<template>
  <div class="list" ref="wrapper">
   <div>
    <div class="area">
      <div class="title border-topbottom">当前城市</div>
      <div class="button-list">
       <div class="button-wrap">
        <div class="button">{{this.city}}</div>
       </div>
      </div>
    </div>
    <div class="area">
      <div class="title border-topbottom">热门城市</div>
      <div class="button-list">
       <div class="button-wrap" v-for="item of hotCities" :key="item.id">
        <div class="button" @click="tabCity(item.name)">{{item.name}}</div>
       </div>
      </div>
    </div>
    <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
      <div class="title border-topbottom">{{key}}</div>
      <div class="item-list">
        <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="tabCity(innerItem.name)">{{innerItem.name}}</div>
      </div>
    </div>
   </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState } from 'vuex'
export default{
  name: 'CityList',
  props: ['cities', 'hotCities', 'letter'],
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper, {click: true})
  },
  computed: {
    ...mapState(['city'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  methods: {
    tabCity (city) {
      this.$store.commit('tabCity', city)
      this.$router.push('/')
    }
  }
}
</script>

<style lang="stylus" scoped>
  .border-topbottom
    &:before
      border-color:#777
    &:after
      border-color:#777
  .border-bottom
    &:before
      border-color:#777
  .list
    overflow:hidden
    position:absolute
    top:1.58rem
    left:0
    right:0
    bottom:0
    .title
      line-height:.54rem
      padding-left:.2rem
      background:#eee
      color:#666
      font-size:.26rem
    .button-list
      padding:.1rem .6rem .1rem .1rem
      overflow:hidden
    .button-wrap
      float:left;
      width:33.3%
      .button
        text-align:center
        margin:.1rem
        border:.02rem solid #ccc
        padding:0.1rem 0
        border-radius:.06rem
    .item-list
      .item
        line-height:.76rem
        color:#666
        padding-left:.2rem
</style>
